In the region where I reside, your private parking lot is only as good as yours when it is unoccupied. You can put up all kinds of private parking and warning signs, but you cannot legally remove another vehicle, parked in your private space. The traffic police or municipality WILL NOT intervene or issue any summons unless it is blocking another public road which emergency services need to have access to.
You can expect from what the technical specifications says it all. All you need is the little effort to make the 3 holes as guided and the device is as steady as a rock.
Finally, no more frustration about intruded parkings! This ought to be a basic necessity for all private parking owners!